Spring construction.



PATENTED JULY 11,1905.

W. OTT.

SPRING CONSTRUCTION. APPLICATION FILED JAN. 20. 1905.

UNITED STATES Patented July 11, 190-5.

PATENT OEEIcE.

SPRING CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 794,541, dated. July11, 1905.

Application filed January 20, 1905. Serial No. 242,034.

To all whom, it may concern.-

Be it known that I, WILLIAM Orr, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Spring Constructions, of whichthe following is a specification.

My invention relates particularly to spring construction for couches,beds, seats, &c.; and my primary object is to provide an upholsterersspring having means for connection with a slat, whereby the use ofseparate or independent attaching means with the obvious disadvantagesincidental thereto may be dispensed with.

The invention is of peculiar advantage when used in a constructionwherein wooden slats or bars form the supports for the springs, andaccordingly the improved spring is illustrated in the accompanyingdrawing as applied to a wooden slat of such a construction.

The drawing shows a perspective view of such a spring and a section of aslat to which it is applied.

In the construction illustrated, A represents the improved spring, and Bthe slat to which it is applied. The spring preferably is approximatelyof the usual hou r-glass form. The upper end of the spring may be of anydesired form. I have shown it with the usual circular end-ringtermination, the extremity of the Wire being knotted upon the adjacentportion of the spiral. The lower end of the spring terminates in a basecomprising a spiral or incomplete ring a. which extends on a curvedincline from a point a, where it bears on the top of the slat at oneedge thereof to a point a at the lower portion of the same edge. Thenthe continuity of the ring is broken by struck-up portions (0 which arediametrically opposite each other and afford a channel or socket for theslat, and, finally, the end portion of the wire which forms one side ofthe channel at the struck-up portion a is bent inwardly, having a pointa which is forced into the edge of the slat or entered in a holetherein, as the case may be. The

channel or socket for the slat is narrower at its bottom than at itstop, thereby affording clamping-shoulders, one of which is at the pointa and the others at points a (4 The wire is curved somewhat at saidshoulders to enable the spring to be forced down till the slat isproperly entered in its socket at the spring-base after the point a hasbeen entered.

The spring is applied by forcing the point into one edge of the slat,where the latter is of wood, and then pressing down upon the spring tocause the slat-socket to yield and admit the slat, the clamping actionbeing sufficient to securely retain the spring in place. To render thesprings noiseless in use, it is preferred to place a strip of cloth orburlap b on the upper surface of the slat, so that when the springs arein place the cloth is clamped between them and the slat. It is desirableto make the channel for the slat enough narrower at its bottom than theslat toinsure a close fit notwithstanding shrinkage of the slat, itbeing understood that the springiness of the wire ordinarily used forupholstering purposes is suflicient to accomplish the desired result.The point a obviously prevents the spring from slipping longitudinallyof the slat, and it is of course understood that the springs aresuitably spaced along the slats and have their upper ends joinedtogether in any suitable manner. The form of the slat-socket may bealtered at will, and the spring-base may be changed otherwise in formwithout departure from my invention. It is incidental to theconstruction that a finished bottom is provided, rendering itunnecessary to apply a cloth covering to the bottom of the springconstruction.

Changes in details of construction are contemplated. Hence no unduelimitation should be understood from the foregoing detailed description.

What I regard as new, and desire to secure by Letters Patent, is

1. An upholsterers spring having its basecoil provided with aslot-receiving channel the sides of which form spring-jaws to engage thesides of the slat, said jaws extending forwardly and rearwardly beyondthe center of the spring.

2. An upholsterers spring having its basecoil provided with aslat-receiving channel the sides of which form spring-jaws to engage thesides of the slat, said jaws extending forwardly and rearwardly beyondthe center of the spring, and provided with an inturned end adapted tobe fastened to said slat.

3. An upholsterers spring having its basecoil provided with aslat-receiving channel serving to clampingly engage a slat and having anintegral inturned pointed extremity entering said channel and adapted toenter an edge of a slat, for the purpose set forth.

4. An upholsterers spring having a base with struck-up portions locateddiametrically opposite each other with reference to the body of thespring and forming two slat-clamps symmetrically placed in a transverseline intersecting the aXis of the spring and each having shoulders forengaging the lateral edges of a slat, for the purpose set forth.

5. An upholsterers spring having a base with diametrically-opposedstruck-up portions a a afiording a slat-receiving channel flanked byrounded clamping-shoulders, the wire terminating in an inturned pointentering said channel, for the purpose set forth.

6. The combination with a slat, of a superposed upholsterers springhavinga base provided with diametrically-opposed struck-up portionsaffording clamps with shoulders engaging the edges of the slat, saidclamps being joined by a connecting member flanking an edge of the slat,the clamps being free from engagement with the lower surface of theslat, for the purpose set forth.

WILLIAM OTT.

In presence of-- F. M. WVIRTZ, J. H. LANDES.

